When it comes to inscribed quadrilaterals in a circle, just remember the conjecture:
Opposite angles of a any type of quadrilateral inscribed in a circle have a sum of 180°. This means that they are supplementary.
The given in your figure is 98° and the opposite angle (the angle ACROSS it) is x. According to the conjecture then, these angles should be equal to 180°.
Let's make that into an equation then:
98° + x = 180°
We solve for x then by first subtracting 98° from both sides to isolate x:
Explanation: this question is a little bit tricky since Mexico (the country) in general is located part in North America and part in Central America. However, Mexico city which is the capital of Mexico is definitely located in North America.
